This is the 18407th most frequent Russian word.
электропроводки
Electrical wiring.
The word 'электропроводки' is used here to refer to electrical wirings as a plural noun.
Электропроводки были заменены в старом здании.
The electrical wirings were replaced in the old building.
Here, 'электропроводки' represents the electrical wires in a general context.
Для подключения электроприборов необходимо проверить электропроводки.
To connect electrical appliances, it is necessary to inspect the electrical wirings.
This sentence uses 'электропроводки' in the singular form to denote the overall wiring system.